Power pipe-bending machine.



B. SCHENK 6L J. SZOKE. Powfn PIPE BENDING MAcHmE.

B. SCHENK & J. SZOKE.

'POWER PIPE BENDING MACHINE.

APPucATxoN FILED FEB. 9.1918.

l 27794, Patented Sept. 3, 1918.

4 SHEETS-SHEET 3.

| i." 1 l C BY 0MM; JUSEPH 52mm. w, fmATzroRNm/s, f

Q IN VEN TORS:

B. SCHENK @L l. SZOKE.

POWER PIPE BENDING MACHINE.

APPLICATION FILED FEB. 9. l9l8.

Patented Sept. 3, 19l8.

4 SHEETS-SHEET 4.

INVENToRs.- YERNJMJPDT SCHENK,

` therein;

-ERNHARDT SCHIENK AND JOSEPH SZOKE, OF- CHICAGO, ILLINOIS.

POWER rirE-BENmNG MACHINE,

Larmes Application fnedrebmaryfa 191s. sei-iai Noi'zlaisc.

To dll fw/L'om t may concern.'

Be it known that We, BERNHARDT SCHENK and JOSEPH Szoxn, citizensof the United States, and reside-nts of Chicago, in the county of Cook and State of Illinois, -have jointly invented certain new and useful Improvements in `Power Pipe-Bending `Mia-- chin'es; and We do hereby declare that the following description of our said'invention, taken in connection with the accompanying sheets Of`dr-aWings, forms a full, clear, and exact specification, which will enable others skilled in the art to'vvhich our said invention appertains-to make and use the same.

'This invention has general reference to pipe bending and pipe coiling machines ,and it consists, essentially, in the novel and peculiar 'combination of parts, and details of construction, ashereinafter rst fully set forth and described, and thenY pointed out in the claims.

The object of this invention is the production of a power-operated machine for etliciently, accurately, and rapidly bending and ceiling pipes and rods. It is especially adapted foi operation on cold pipe up to three inches in diameter, but may also be made to take and bend larger sized pipes.

In the accompanying drawings which illustrate the preferred embodiment of our invention, lFigure 1 is a` side elevation of one form of our pipe bending machine. Fig. 2 is a perspective vievi7 of one Style of links employed in this machine; and Fig. 3 is a like view of another style of links employed Fig. 4c is a rear elevation of the machine. Fig. 5 isV a plan of the machine drawn on anincreased scale, part of the gearing employed to rotate the upper forming rollbeing omitted. Fig. 6 is an end view of .a detail of construction and illus-V trating means for spacing or pitching the convolutions of a coil of pipe. Fig. 7 is an end elevation of the machine. Fig. 8 is a sectional elevation of a part of the machine, on line 11-11 of Fig. 7. Fig. 9 is a view of the gearing employed by Which the three forming rolls used in this `machine are rotated.

Like parts are designated by the same characters and symbols `of reference in all the figures.

VThis machine includes a pair of parallel,

spacedapart housings A, Aa, preferably mounted on a base or bed plate B, Which latter plate is suitably supported on leOs C.

`Speci'ii'fcatin ef` Lette-ijs Patent. p

Patented sept. s, isis.

These housings "are, preferably, plates of propcrlthickness, edged on three margins by ribs or'iianges 12, to impart rigidity and stiffness to4 these plates. In each of these plates there is medially, an excision 13, best shown in- Fig. 2, which excisions extend having at its opposite end a Worm 19, which engages a Worm Wheel 20, fixed to a shaft 21, which may Atraverse the space between the housings A, A, as indicated in Fig. 1,

and may be journaled in bearings 22, 22a,

or may have only a short shaft 21, and a singlebea'ring 22, as illustrated in Fig. 5. Adjacent the Worm Wheel 20 there is mounted on shaft 21a gear pinion 23, which meshes With a spurgear Wheel 24, mounted on a shaft 25, which shaft traverses the space between the housings A, A, and carries at its outer end the first one of a set of three forming rolls 26, 27, and 28. This shaft is journaled in bearings 29, 30, Fig. 5, secured to the housings A, A, The second forming roll 27 is mounted on a shaft 31, journaled in bearings 32, 33, secured to the housing A, Aa, While the third forming roll 28 is mounted at the end of a shaft 311, having its bearings 35, 36, in an inverted Ushaped yoke D, best shown in Fig. 8. The tvvo roller shafts 31V and 341 are rotated bymechanism best illustrated in Fig. 9, and comprises a gear Wheel E, mounted on the first roller shaft 25, a second gear Wheel F, mounted on the second.V roller shaft 31, and an intermediate. gear pinion G, the latter gear pinion being mounted on a shaft 37, journaled in bearings 38, fixed to the housings A, Aa. Upon the third roller shaft 34 there is fixed a gear Wheel H; but since this shaft With its gear Wheel H and forming roll 28 is designed forvertical movement, and since the forming roll 28 must, of necessity, rotate in a direction` opposedto that of the forming rolls 26 and 27, this gear Wheel H is connected to the gear wheel E on the first roller shaft by two gear pinions l, J, mounted 0n shafts 39, 40, which shafts rotate in bearings in the following manner: v

Upon the first roller shaft and the third roller shaft 34 there are mounted` links Gr, shown inV detail in Fig. `2, and

By means of these links the gear wheelV lvl inaymovelvertically and still remain in perfect mesh with the intermediate pinion J, the latter pinion. in proper engagement with the pinion L, and this pinion, in turn,

with the driving gear wheel E.

The Usshaped yoke D is vertically moved by mechanism including the following elements: j A l Upon each of the horizontally disposed ribs or flanges l2 of the housing plates there is bolted by bolts 48, Figs. 4 and 5, an inverted, U-shaped member M, the space between the parallel members of which forms a continuation of the excisions 13 in the plates A, Aa, and thus forms guide ways for the bearings on the yoke D, there being in the connecting bar 50, of the members D, and medially thereof, a screwthreaded opening 51, wherewith engages an adjusting screw 52, which rotates in a bearing 53, formed in a cross bar 54, connecting the two j members M, and bolted thereto by screws Upon the upper end of this screw 52 there is affixed an element 56, by which the screw 52 may be rotated. This element may be a hand wheel, in a machine in which only helical coils of pipe will be formed; but in a machine wherein also spirals are to be formed, this element 56 will be a worm wheel, and this worm Entending from the members M there are kbrackets 57, shown best in Fig. 7, havy ing bearings 58, in which is rotatably mounted a shaft 59, carrying a worm 60, engaging the worm wheel 5G. This. shaft 59 has-at one end a hand crank 6l, by which it maybe rotated to make primary adjustment Vof the screw 52; but when this screw is to be automatically rotated we employ gearing comprising a gear wheel 62, removably secured to that end of the shaft 59 opposed to the end carrying the hand crank 6l. As shown in Fig. l, there are `on the brackets 57 further bearings 63, in which rotates a shaft G4, carrying at one end a gear wheel G5, meshing with the` gear wheel 62; and in one embodiment of our invention, as shown in Figs. l, 4 and 7 there is on Vthe shaft 64 behind the gear wheel 65 l arfurther gear wheel G6, which engages the flarge spur wheel 24, and thereby rotates shaft G4. These gear wheels 62 and 65 are removably placed `upon their shafts and constitute so-called change gears, that is to say, they may beclianged for others of different diameters, as long as .they are planned that their centers are of the same distance axially. VBy changing these gears we can attain any desired rotative speedV of the lifting screwy 52, and therebyV vary the `diameter of 'the convolutions of a spirally coiledV pipe, as the spiral `is being developed.

ln. Figs. l and 4, we. have shown the gear wheelsl 65 and 6G of the same diameter, and

the driven `gear wheel 62 proportionately reducechwhile in` Fig. 5 we show the gear wheel 65 of smaller, and the gear wheel.

AGG of proportionately larger diameter to illustrate this point of employing change gears for rotating the screw 52. v

For the purpose of properly spacing the i convolutions of a coil of pipe any desireddistance apart, we employ the device shown in Figs. l, 5 and 6, comprising a bar 80,

preferably of semicircular cross section.

This bar is placed on that side of the top forming roll from which the pipe which is 'i being bent will issue and thereby pass the b ar 80 and be slightly deflected. This 'bar hasa shank 8l, which is acted upon by dicated in dotted lines in Fig..5, to vary the pitch of the .coil-convolutions. This curved washer 83 functions in the following manner :r l/Vhen `the pipe to be `coiled passes the threeforining rolls and leaves the forming roll27 `and has made approximately a complete turn, it passes in front of the curved washer 83 and is thereby de fleet-,ed from its straight course, the degree of deflection being determined Vby the disiooV tance from the center of thegroove `in the the pipe in front of this washer.

le have heretofore described the inachine as being provided with but one each of the gear wheels G, E, I, J, and H; but in practice we prefer to employ two of each of these gear wheels, which are placed in pairs on their respective shafts, as illustrated in Fig. 7 to better to distribute and equalize the strain or stress on these shafts, and to provide for a more secure operation of the machine.

The operation of this machine will be readily understood from the foregoing description, and may be briefly summarized, as follows: p

When helical coils are to be formed in which all the convolutions are of the same diameter, the screw-rotating device is disconnected from the large spur gear wheel by removing one of the change gears, or by placing the trundle gear in normal position, which permits the shaft 59 on which the worm 60 is mounted being' rotated by the hand crank 61 to make proper adjustment of the upper forming roll for diameter, and then moving the pipe deflecting element 80 for pitch of the coil. When, however, conical spiral coils are to be formed, a proper set of change gears is placed on their shafts and the machine set for the smallest diameter of the spiral. Then the screw-rotating mechanism is placed in operation when the following convolutions will be formed with progressively larger diameters until the coil is completed. The coil thus formed will be, of necessity a truncated cone of the desired pitch; but if the coils are desired `to be all the same plane, it will be necessary to support the coil at its outermost convolution and depress the center until all the convolutions are in the same plane.

The relative sizes of the change gears may have to be determined by actual experiments and will depend upon the size of the coil, the size and thickness of the pipe, its material, and its hardness, so that a fixed standard of change gears cannot well be determined in advance of actual trial, but when once ascertained. can be readily duplicated later on.

`We have hereinbefore described with considerable minuteness the preferred embodiment of our invention, but we desire it to be understood that we are aware that many of the details disclosed may be changed, and parts omitted Vwithout departing from the scope of our invention as defined in the subjoined claims.

Having thus fullyv described our invention, we claim as new and desire to secure by Letters Patent of the United States l. In a pipe bending and coiling machine, the combination, of a pair of housings in parallel spaced relationship, said housings having approximately medially slotted openings, a pair of shafts in said housings in parallel spaced relationship, fixed bearings in said housings for said pair of shafts,

a grooved forming roll at one end of each of said pair of shafts, means for operatively connecting the pair of shafts, a U-shaped element upon each of said housings, the spaces between the parallel members of said elements being alined With the slots in said housings, a yoke, said yoke having bear ings engaging said slots, a shaft in the latter bearings, a grooved forming roll at the end of the last-mentioned shaft and alined with the other forming rolls, gearing c011- necting the first forming roll shaft to the second forming roll shaft, and other gearing connecting the first forming roll shaft to the third forming roll shaft.

2. In a pipe bending and coiling machine, the combination, of a pair of housings in parallel spaced relationship, said housings having approximately medially slotted openings, a pair of shafts in said housings in parallelspaced relationship, fixed bearings in said housings for said pair of shafts, a grooved forming roll at om. nml. of each of said pair of shafts, means for operatively connecting the pair of shafts, a U-shaped element" upon each of said housings, the space between the parallel members of said elements being alined with the slots in said housings, a yoke, said yoke having bearings engaging said slots, a shaft in the latter bearings, a grooved forming roll at the end of the lastmentioned shaft and alined with the other forming rolls, gearing connecting the first forming roll shaft to the second forming roll shaft, other gearing connecting the first forming roll shaft to the third forming roll shaft, and means for raising and lowering said yoke.

3. In a pipe bending and coiling machine, the combination, of a pair of housings in parallel spaced relationship, said housings having approximately medially slotted openings, a pair of shafts in said housings in parallel spaced relationship, fixed bearings in said housings foi` said pair of shafts, a grooved forming roll at one end of each of said pair of shafts, means for operatively connecting the pair of-shafts, a U-shaped elementupon each of said housings, the

space between the parallel members of said elements being alined with the slots in said housings, a yoke, said yoke having bearings engaging said slots, a shaft in the latter bearings, a grooved forming roll at the end of the last-mentioned shaft and alined with the other forming rolls, means for operating one of said forming` roll shafts, gearing for connecting the third forming roll shaft to the first forming roll shaft, and means for automatically raising and lowering said yoke.l

4l. In a pipe bending and coiling machine, the combination, of a pair of housings in parallel spaced relationship, said housings having approximately medially slotted openings, a pair of shafts in said housings in parallel spaced relationship, said `shafts being horizontally mounted in said housings, fixed bearings in said housings for said pair of shafts, a grooved forming roll at one end of each of said pair of shafts, means for rotating one of this pair of shafts, said means including a shaft, a worm on said shaft, a-wor1n wheel, a gear pinion in the rear of and adjacent to said worm wheel, a shaft upon which the worm wheel and the gear pinion are rotatively mounted and a large spur gear wheel mounted upon the one of the pair' of shafts and meshing with said gear pinion, a third forming roll shaft in said housing intermediate of and above the pair of forming rolls, a grooved forming roll at the end of said third forming roll shaft and alined with the other forming rolls, means connecting the first forming roll shaft to the second forming roll shaft, other means for connecting the first forming roll shaft to the third forming roll shaft, a yoke in which the third forming roll shaft is rotatably mounted, and means for raising and lowering said yoke, said means being connected to the first forming roll driving mechanism.

5. In a pipe bending and coil forming machine,rthe combination, of a pair of housings in parallel spaced relationship, said housings having approximately medially slotted openings, a pair of spaced apart bearings in horizontal alinement :in said housing, a shaft rotatably mounted in each of said pairs of bearings, a grooved forming roll at the outer end of each of said shafts, an inverted U-shaped yoke, said yoke having journal bearings at the terminals of the parallel members of said yoke, said yoke being vertically movable in said openings, a shaft rotatably mounted in the latter bearings, a grooved forming roll at the end of the latter shaft and alined with the two first-named forming rolls, gearing for in'iparting rotative movement to the first forming roll shaft, gearing for imparting rotative movement to the second forming roll shaft from the first forming roll shaft, other gearing foi iniparting rotative movement to the third forming roll shaft from said first forming roll shaft, the latter gearing including a gear wheel fixed to the first forming roll shaft, a further gear wheel fixed to the third forming roll shaft, and a pair of intermediate gear wheels, said pair of intermediate gear wheels being in meshwith each other, one of said intermediate gear wheels being in mesh with the gear wheelon the first forming roll shaft, the'other of said intermediate gear wheels being in mesh with the gear wheel on the third forming ioll shaft, a shaft for each of said intermediate gear wheels, a link connecting the first forming roll shaft to the shaft carrying the first intermediate gear wheel, a further link conneeting the third forming roll shaft to the shaft of the secondintermediate gear wheel sh aft, anda third link connecting the two intermediate gear shafts, and means for manually, and automatically raising and lowering the yoke carrying the third forming roll shaft, said latter means being connected to the first. forming roll driving mechanism and including removable chaiige-gear mechanism for varying the speed of the vertical movement of said yoke.

G. In a pipe bending and coil forming machine, the combination, of a set of three grooved forming rolls in spaced relationship, two of said forming rolls being rotatively arranged infiXed bearings, an inverted U-shaped yoke, the free ends of said yoke being formed into bearings, a shaft rotatably mounted in said bearings, a third forming roll on the latter shaft, the third forn'iing roll being constructed to move vertically with said yoke, means for rotating said forming rolls including a main spur gear wheel, and means for raising and lowering said third forming roll, said means including screw mechanism connected with the said yoke, and mechanism for automatically rotating said screw mechanism while said forming rolls are rotating, said latter mechanism including a driven gear wheel in mesh with said main spur gear wheel, a set of interchangeable gear wheels of varying diameters a pair of which is rotatably connected to the said driven gear wheel and operatively connected to said screw mechanism. Y.

In testimony that we claim the foregoing as our invention, we have hereunto set our hands at Chicago, Cook county, State of Illinois, this 5th day of February, 1918.

BERNHARDT SCI-HENK. JUSEPH SZOKE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patente, Washington, D. C. 

